Category: F
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Fecal osmolality
The concentration of solutes in stool. In health, this is equivalent to the concentration of solutes in plasma.
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Follicular odontoma
A bony shell in the gums below the tooth margin, usually appearing after the second dentition. It is due to an excessive number of dental follicles. The tumor often involves one or more teeth and is crepitating to pressure.
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Fixation nystagmus
Nystagmus that occurs only when the eyes gaze at an object.
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Forensic nursing
A subspecialty of nursing in which nurses participate in sexual assault examinations and other legal affairs affecting mental, occupational, and public health.
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Flight nurse
A nurse who cares for patients being transported in an aircraft.
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Free nucleus
A nucleus that is no longer surrounded by the other cellular components.
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Fertilization nucleus
A nucleus produced by the joining of the male and female nuclei in the fertilization of the ovum.
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Fastigial nucleus
A nucleus in the medullary portion of the cerebellum that receives afferent fibers from the vestibular nerve and superior vestibular nucleus. The afferent fibers form the fasciculus uncinatus and the fastigiobulbar tract.
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Facial motor nucleus
A nucleus in the medulla oblongata in the floor of the fourth ventricle giving rise to efferent fibers of the facial nerve.
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Foreign body in the nose
Presence of material in the nasal cavity that was either inhaled or accidentally placed there. A child may place a foreign object in his or her own or another child’s nose. Symptoms: Coughing or watery or purulent discharge; occasionally pain and obstruction of nose. The foreign body may cause a nasal obstruction and infection, often…